Model Tests for Hydrodynamic Pressure Caused by Vibrations of a Vertical Flat Weir Plate and Verification of Theoretical Analysis

Abstract

This paper presents model test results for the hydrodynamic pressure caused by the streamwise and vertical vibrations of the vertical flat weir plate, to verify the theoretical analyses for hydrodynamic pressure, developed by Ishii and Anami, for its validity. The streamwise vibration pushes and draws the upstream water, thus inducing a excessive push-and-draw pressue, while the vertical vibration fluctuates the flow rate under the weir plate, thus inducing a flow-rate variation pressure. A vertical flat weir plate model standing over the horizontal channel floor was forced to vibrate at a small amplitude, in the streamwise and vertical directions, respectively, and the vibration-induced hydrodynamic pressure was measured along the weir plate. The measured data were compared with the theoretical ones, to show their close agreement.